#列表练习

list1 = ['列表','元组']
print(list1)
list2 = list('一号字串')
print(list1,list2,list2[0])
list2[0] = 'dan'
print(list2)
del list2[0]
print(list2)
list2.append(123)
print(list2)
list1.extend(list2)
print(list1)